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-rw-r--r--drivers/hwmon/Kconfig10
-rw-r--r--drivers/hwmon/Makefile1
-rw-r--r--drivers/hwmon/adt7461.c656
3 files changed, 667 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 0b62c3c6b7ce..42e077c4dfeb 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -179,6 +179,16 @@ config SENSORS_ADT7411
This driver can also be built as a module. If so, the module
will be called adt7411.
+config SENSORS_ADT7461
+ tristate "Analog Devices ADT7461"
+ depends on I2C && EXPERIMENTAL
+ help
+ If you say yes here you get support for the Analog Devices
+ ADT7461 temperature monitoring chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called adt7461.
+
config SENSORS_ADT7462
tristate "Analog Devices ADT7462"
depends on I2C && EXPERIMENTAL
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 3c9ccefea791..665a82fd1f91 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_SENSORS_ADS1015) += ads1015.o
obj-$(CONFIG_SENSORS_ADS7828) += ads7828.o
obj-$(CONFIG_SENSORS_ADS7871) += ads7871.o
obj-$(CONFIG_SENSORS_ADT7411) += adt7411.o
+obj-$(CONFIG_SENSORS_ADT7461) += adt7461.o
obj-$(CONFIG_SENSORS_ADT7462) += adt7462.o
obj-$(CONFIG_SENSORS_ADT7470) += adt7470.o
obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o
diff --git a/drivers/hwmon/adt7461.c b/drivers/hwmon/adt7461.c
new file mode 100644
index 000000000000..50e50ee9e424
--- /dev/null
+++ b/drivers/hwmon/adt7461.c
@@ -0,0 +1,656 @@
+/*
+ * adt7461.c - Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/regulator/consumer.h>
+#include <linux/i2c.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/delay.h>
+
+/*
+ * The ADT7461 registers
+ */
+
+#define ADT7461_REG_R_MAN_ID 0xFE
+#define ADT7461_REG_R_CHIP_ID 0xFF
+#define ADT7461_REG_R_CONFIG1 0x03
+#define ADT7461_REG_W_CONFIG1 0x09
+#define ADT7461_REG_R_CONVRATE 0x04
+#define ADT7461_REG_W_CONVRATE 0x0A
+#define ADT7461_REG_R_STATUS 0x02
+#define ADT7461_REG_R_LOCAL_TEMP 0x00
+#define ADT7461_REG_R_LOCAL_HIGH 0x05
+#define ADT7461_REG_W_LOCAL_HIGH 0x0B
+#define ADT7461_REG_R_LOCAL_LOW 0x06
+#define ADT7461_REG_W_LOCAL_LOW 0x0C
+#define ADT7461_REG_R_LOCAL_CRIT 0x20
+#define ADT7461_REG_W_LOCAL_CRIT 0x20
+#define ADT7461_REG_R_REMOTE_TEMPH 0x01
+#define ADT7461_REG_R_REMOTE_TEMPL 0x10
+#define ADT7461_REG_R_REMOTE_OFFSH 0x11
+#define ADT7461_REG_W_REMOTE_OFFSH 0x11
+#define ADT7461_REG_R_REMOTE_OFFSL 0x12
+#define ADT7461_REG_W_REMOTE_OFFSL 0x12
+#define ADT7461_REG_R_REMOTE_HIGHH 0x07
+#define ADT7461_REG_W_REMOTE_HIGHH 0x0D
+#define ADT7461_REG_R_REMOTE_HIGHL 0x13
+#define ADT7461_REG_W_REMOTE_HIGHL 0x13
+#define ADT7461_REG_R_REMOTE_LOWH 0x08
+#define ADT7461_REG_W_REMOTE_LOWH 0x0E
+#define ADT7461_REG_R_REMOTE_LOWL 0x14
+#define ADT7461_REG_W_REMOTE_LOWL 0x14
+#define ADT7461_REG_R_REMOTE_CRIT 0x19
+#define ADT7461_REG_W_REMOTE_CRIT 0x19
+#define ADT7461_REG_R_TCRIT_HYST 0x21
+#define ADT7461_REG_W_TCRIT_HYST 0x21
+
+/*
+ * Device flags
+ */
+#define ADT7461_FLAG_ADT7461_EXT 0x01 /* ADT7461 extended mode */
+
+/*
+ * Client data
+ */
+
+struct adt7461_data {
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ struct regulator *regulator;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+ int flags;
+
+ u8 config_orig; /* Original configuration register value */
+ u8 alert_alarms; /* Which alarm bits trigger ALERT# */
+
+ /* registers values */
+ s8 temp8[4]; /* 0: local low limit
+ 1: local high limit
+ 2: local critical limit
+ 3: remote critical limit */
+ s16 temp11[5]; /* 0: remote input
+ 1: remote low limit
+ 2: remote high limit
+ 3: remote offset
+ 4: local input */
+ u8 temp_hyst;
+ u8 alarms; /* bitvector */
+};
+
+/*
+ * Conversions
+ */
+
+static inline int temp_from_s8(s8 val)
+{
+ return val * 1000;
+}
+
+static u8 hyst_to_reg(long val)
+{
+ if (val <= 0)
+ return 0;
+ if (val >= 30500)
+ return 31;
+ return (val + 500) / 1000;
+}
+
+/*
+ * ADT7461 attempts to write values that are outside the range
+ * 0 < temp < 127 are treated as the boundary value.
+ *
+ * ADT7461 in "extended mode" operation uses unsigned integers offset by
+ * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
+ */
+static inline int temp_from_u8(struct adt7461_data *data, u8 val)
+{
+ if (data->flags & ADT7461_FLAG_ADT7461_EXT)
+ return (val - 64) * 1000;
+ else
+ return temp_from_s8(val);
+}
+
+static inline int temp_from_u16(struct adt7461_data *data, u16 val)
+{
+ if (data->flags & ADT7461_FLAG_ADT7461_EXT)
+ return (val - 0x4000) / 64 * 250;
+ else
+ return val / 32 * 125;
+}
+
+static u8 temp_to_u8(struct adt7461_data *data, long val)
+{
+ if (data->flags & ADT7461_FLAG_ADT7461_EXT) {
+ if (val <= -64000)
+ return 0;
+ if (val >= 191000)
+ return 0xFF;
+ return (val + 500 + 64000) / 1000;
+ } else {
+ if (val <= 0)
+ return 0;
+ if (val >= 127000)
+ return 127;
+ return (val + 500) / 1000;
+ }
+}
+
+static u16 temp_to_u16(struct adt7461_data *data, long val)
+{
+ if (data->flags & ADT7461_FLAG_ADT7461_EXT) {
+ if (val <= -64000)
+ return 0;
+ if (val >= 191750)
+ return 0xFFC0;
+ return (val + 64000 + 125) / 250 * 64;
+ } else {
+ if (val <= 0)
+ return 0;
+ if (val >= 127750)
+ return 0x7FC0;
+ return (val + 125) / 250 * 64;
+ }
+}
+
+static int adt7461_read_reg(struct i2c_client* client, u8 reg, u8 *value)
+{
+ int err;
+
+ err = i2c_smbus_read_byte_data(client, reg);
+ if (err < 0) {
+ pr_err("adt7461_read_reg:Register %#02x read failed (%d)\n",
+ reg, err);
+ return err;
+ }
+ *value = err;
+
+ return 0;
+}
+
+static int adt7461_read16(struct i2c_client *client, u8 regh, u8 regl,
+ u16 *value)
+{
+ int err;
+ u8 oldh, newh, l;
+
+ /*
+ * There is a trick here. We have to read two registers to have the
+ * sensor temperature, but we have to beware a conversion could occur
+ * inbetween the readings. The datasheet says we should either use
+ * the one-shot conversion register, which we don't want to do
+ * (disables hardware monitoring) or monitor the busy bit, which is
+ * impossible (we can't read the values and monitor that bit at the
+ * exact same time). So the solution used here is to read the high
+ * byte once, then the low byte, then the high byte again. If the new
+ * high byte matches the old one, then we have a valid reading. Else
+ * we have to read the low byte again, and now we believe we have a
+ * correct reading.
+ */
+ if ((err = adt7461_read_reg(client, regh, &oldh))
+ || (err = adt7461_read_reg(client, regl, &l))
+ || (err = adt7461_read_reg(client, regh, &newh)))
+ return err;
+ if (oldh != newh) {
+ err = adt7461_read_reg(client, regl, &l);
+ if (err)
+ return err;
+ }
+ *value = (newh << 8) | l;
+
+ return 0;
+}
+
+static struct adt7461_data *adt7461_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7461_data *data = i2c_get_clientdata(client);
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ / 2 + HZ / 10)
+ || !data->valid) {
+ u8 h, l;
+
+ pr_err("adt7461_update_device:Updating adt7461 data.\n");
+ adt7461_read_reg(client, ADT7461_REG_R_LOCAL_LOW, &data->temp8[0]);
+ adt7461_read_reg(client, ADT7461_REG_R_LOCAL_HIGH, &data->temp8[1]);
+ adt7461_read_reg(client, ADT7461_REG_R_LOCAL_CRIT, &data->temp8[2]);
+ adt7461_read_reg(client, ADT7461_REG_R_REMOTE_CRIT, &data->temp8[3]);
+ adt7461_read_reg(client, ADT7461_REG_R_TCRIT_HYST, &data->temp_hyst);
+
+ if (adt7461_read_reg(client, ADT7461_REG_R_LOCAL_TEMP, &h) == 0)
+ data->temp11[4] = h << 8;
+
+ adt7461_read16(client, ADT7461_REG_R_REMOTE_TEMPH,
+ ADT7461_REG_R_REMOTE_TEMPL, &data->temp11[0]);
+
+ if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_LOWH, &h) == 0) {
+ data->temp11[1] = h << 8;
+ if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_LOWL, &l) == 0)
+ data->temp11[1] |= l;
+ }
+ if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_HIGHH, &h) == 0) {
+ data->temp11[2] = h << 8;
+ if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_HIGHL, &l) == 0)
+ data->temp11[2] |= l;
+ }
+
+ if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_OFFSH,
+ &h) == 0
+ && adt7461_read_reg(client, ADT7461_REG_R_REMOTE_OFFSL,
+ &l) == 0)
+ data->temp11[3] = (h << 8) | l;
+ adt7461_read_reg(client, ADT7461_REG_R_STATUS, &data->alarms);
+
+ /* Re-enable ALERT# output if it was originally enabled and
+ * relevant alarms are all clear */
+ if ((data->config_orig & 0x80) == 0
+ && (data->alarms & data->alert_alarms) == 0) {
+ u8 config;
+
+ adt7461_read_reg(client, ADT7461_REG_R_CONFIG1, &config);
+ if (config & 0x80) {
+ pr_err("adt7461_update_device:Re-enabling ALERT#\n");
+ i2c_smbus_write_byte_data(client,
+ ADT7461_REG_W_CONFIG1,
+ config & ~0x80);
+ }
+ }
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+/*
+ * Sysfs stuff
+ */
+
+static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7461_data *data = adt7461_update_device(dev);
+ int temp;
+
+ temp = temp_from_u8(data, data->temp8[attr->index]);
+
+ return sprintf(buf, "%d\n", temp);
+}
+
+static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ static const u8 reg[4] = {
+ ADT7461_REG_W_LOCAL_LOW,
+ ADT7461_REG_W_LOCAL_HIGH,
+ ADT7461_REG_W_LOCAL_CRIT,
+ ADT7461_REG_W_REMOTE_CRIT,
+ };
+
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7461_data *data = i2c_get_clientdata(client);
+ long val = simple_strtol(buf, NULL, 10);
+ int nr = attr->index;
+
+ mutex_lock(&data->update_lock);
+ data->temp8[nr] = temp_to_u8(data, val);
+ i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7461_data *data = adt7461_update_device(dev);
+ int temp;
+
+ temp = temp_from_u16(data, data->temp11[attr->index]);
+
+ return sprintf(buf, "%d\n", temp);
+}
+
+static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ static const u8 reg[6] = {
+ ADT7461_REG_W_REMOTE_LOWH,
+ ADT7461_REG_W_REMOTE_LOWL,
+ ADT7461_REG_W_REMOTE_HIGHH,
+ ADT7461_REG_W_REMOTE_HIGHL,
+ ADT7461_REG_W_REMOTE_OFFSH,
+ ADT7461_REG_W_REMOTE_OFFSL,
+ };
+
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7461_data *data = i2c_get_clientdata(client);
+ long val = simple_strtol(buf, NULL, 10);
+ int nr = attr->index;
+
+ mutex_lock(&data->update_lock);
+ data->temp11[nr] = temp_to_u16(data, val);
+
+ i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
+ data->temp11[nr] >> 8);
+ i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
+ data->temp11[nr] & 0xff);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t show_temphyst(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7461_data *data = adt7461_update_device(dev);
+ int temp;
+
+ temp = temp_from_u8(data, data->temp8[attr->index]);
+
+ return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
+}
+
+static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7461_data *data = i2c_get_clientdata(client);
+ long val = simple_strtol(buf, NULL, 10);
+ int temp;
+
+ mutex_lock(&data->update_lock);
+ temp = temp_from_u8(data, data->temp8[2]);
+ data->temp_hyst = hyst_to_reg(temp - val);
+ i2c_smbus_write_byte_data(client, ADT7461_REG_W_TCRIT_HYST,
+ data->temp_hyst);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
+ char *buf)
+{
+ struct adt7461_data *data = adt7461_update_device(dev);
+ return sprintf(buf, "%d\n", data->alarms);
+}
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7461_data *data = adt7461_update_device(dev);
+ int bitnr = attr->index;
+
+ return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
+ set_temp8, 0);
+static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
+ set_temp11, 1);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
+ set_temp8, 1);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
+ set_temp11, 2);
+static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
+ set_temp8, 2);
+static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
+ set_temp8, 3);
+static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
+ set_temphyst, 2);
+static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
+ set_temp11, 3);
+
+/* Individual alarm files */
+static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
+/* Raw alarm file for compatibility */
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static struct attribute *adt7461_attributes[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
+
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+ &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ &dev_attr_alarms.attr,
+ NULL
+};
+
+static const struct attribute_group adt7461_group = {
+ .attrs = adt7461_attributes,
+};
+
+static void adt7461_regulator_enable(struct i2c_client *client)
+{
+ struct adt7461_data *data = i2c_get_clientdata(client);
+
+ data->regulator = regulator_get(NULL, "vdd_vcore_temp");
+ if (IS_ERR_OR_NULL(data->regulator)) {
+ pr_err("adt7461_regulator_enable:Couldn't get regulator vdd_vcore_temp\n");
+ data->regulator = NULL;
+ }
+ else {
+ regulator_enable(data->regulator);
+ /* Optimal time to get the regulator turned on
+ * before initializing adt7461 chip*/
+ mdelay(5);
+ }
+}
+
+static void adt7461_regulator_disable(struct i2c_client *client)
+{
+ struct adt7461_data *data = i2c_get_clientdata(client);
+ struct regulator *adt7461_reg = data->regulator;
+ int ret;
+
+ if (adt7461_reg) {
+ ret = regulator_is_enabled(adt7461_reg);
+ if (ret > 0)
+ regulator_disable(adt7461_reg);
+ regulator_put(adt7461_reg);
+ }
+ data->regulator = NULL;
+}
+
+static void adt7461_init_client(struct i2c_client *client)
+{
+ u8 config;
+ struct adt7461_data *data = i2c_get_clientdata(client);
+
+ adt7461_regulator_enable(client);
+ /* Start the conversions. */
+ i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONVRATE,
+ 5); /* 2 Hz */
+ if (adt7461_read_reg(client, ADT7461_REG_R_CONFIG1, &config) < 0) {
+ pr_err("adt7461_init_client:Initialization failed!\n");
+ return;
+ }
+ data->config_orig = config;
+
+ /* Check Temperature Range Select */
+ if (config & 0x04)
+ data->flags |= ADT7461_FLAG_ADT7461_EXT;
+
+ config &= 0xBF; /* run */
+ if (config != data->config_orig) /* Only write if changed */
+ i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1, config);
+}
+
+static int adt7461_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct adt7461_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct adt7461_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(new_client, data);
+ mutex_init(&data->update_lock);
+
+ data->alert_alarms = 0x7c;
+
+ /* Initialize the ADT7461 chip */
+ adt7461_init_client(new_client);
+
+ /* Register sysfs hooks */
+ if ((err = sysfs_create_group(&new_client->dev.kobj, &adt7461_group)))
+ goto exit_free;
+ if ((err = device_create_file(&new_client->dev,
+ &sensor_dev_attr_temp2_offset.dev_attr)))
+ goto exit_remove_files;
+
+ data->hwmon_dev = hwmon_device_register(&new_client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+exit_remove_files:
+ sysfs_remove_group(&new_client->dev.kobj, &adt7461_group);
+exit_free:
+ kfree(data);
+ return err;
+}
+
+static int adt7461_remove(struct i2c_client *client)
+{
+ struct adt7461_data *data = i2c_get_clientdata(client);
+
+ adt7461_regulator_disable(client);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &adt7461_group);
+ device_remove_file(&client->dev,
+ &sensor_dev_attr_temp2_offset.dev_attr);
+
+ /* Restore initial configuration */
+ i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1,
+ data->config_orig);
+
+ kfree(data);
+ return 0;
+}
+
+static void adt7461_alert(struct i2c_client *client, unsigned int flag)
+{
+ struct adt7461_data *data = i2c_get_clientdata(client);
+ u8 config, alarms;
+
+ adt7461_read_reg(client, ADT7461_REG_R_STATUS, &alarms);
+ if ((alarms & 0x7f) == 0) {
+ pr_err("adt7461_alert:Everything OK\n");
+ } else {
+ if (alarms & 0x61)
+ pr_err("adt7461_alert:temp%d out of range, please check!\n", 1);
+ if (alarms & 0x1a)
+ pr_err("adt7461_alert:temp%d out of range, please check!\n", 2);
+ if (alarms & 0x04)
+ pr_err("adt7461_alert:temp%d diode open, please check!\n", 2);
+
+ /* Disable ALERT# output, because these chips don't implement
+ SMBus alert correctly; they should only hold the alert line
+ low briefly. */
+ if (alarms & data->alert_alarms) {
+ pr_err("adt7461_alert:Disabling ALERT#\n");
+ adt7461_read_reg(client, ADT7461_REG_R_CONFIG1, &config);
+ i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1,
+ config | 0x80);
+ }
+ }
+}
+
+/*
+ * Driver data
+ */
+static const struct i2c_device_id adt7461_id[] = {
+ { "adt7461", 0 },
+};
+
+MODULE_DEVICE_TABLE(i2c, adt7461_id);
+
+static struct i2c_driver adt7461_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "adt7461",
+ },
+ .probe = adt7461_probe,
+ .remove = adt7461_remove,
+ .alert = adt7461_alert,
+ .id_table = adt7461_id,
+};
+
+static int __init sensors_adt7461_init(void)
+{
+ return i2c_add_driver(&adt7461_driver);
+}
+
+static void __exit sensors_adt7461_exit(void)
+{
+ i2c_del_driver(&adt7461_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("ADT7461 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_adt7461_init);
+module_exit(sensors_adt7461_exit);